Improvement in lead-holders for dividers



s. L. FOX.

Lead-Holder for Dividers.

Patented April 13,1875.

THE GRAPHIC C0.PHOTO.-LITH.39&41 PARK PLACLN-Y.

UNITED STATES A'IENT @rrrca.

SAMUEL L. FOX, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN LEAD-HOLDERS FOR DIVIDERS.

Specification forming part of Letters Patent No. 162,048, dated April13, 1 75; application filed December 8, 1874.

To all whom it may concern:

Be it known that I, SAMUEL L. FOX, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a certain new anduseful Lead-Holder for Drawing-Dividers; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being bad to the accompanying drawings, whichform part of this specification, in which- Figure 1 is a perspective ofa pair of dividers with my improvement applied. Fig. 2 is a verticallongitudinal section. Figs. 3 and 4 are side elevations.

My invention consists of a short tube of metal, having a bore adapted toreceive the leads at present usually supplied for drawingdividers. Thistube is split vertically on both sides, the split or incision on oneside extending all the way from the top to the bottom of the tube, whilethat on the other side terminates a short distance below the top orupper extremity. The upper section of this tube is cylindrical in form,being designed to fit in the clamp, which usually terminates one leg ofthe dividers, and the lower section or point is tapering or conical.Between said upper and lower sections is an annular shoulder, againstwhich the lower edge of the clamp on the dividers impinges when theholder is in position for use.

A in the drawing represents a thin metallic tube having a split orincision, a, on one side extending through the metal from top to bottom,and a similar slit, a on the opposite side, leaving the part a toprevent the tube from being wholly divided. B represents the upper partof the tube, cylindrical in form, and adapted to fit in the clamp d,which terminates the legof the dividers D. O is the lower end or pointof the holder, between which and the part B is an annular ridge orshoulder, 0, against which the lower edge of said clamp d impinges whenthe holder is in position.

The operation is as follows: A lead, E, of any appropriate orapproximate size is inserted in the holder, whose split sides willexpand, it required, to receive it, the elasticity of the metal whenthus expanded exerting a compression on the lead sufficient to hold itsecurely in place. The cylindrical end B of the tube is then inserted inthe clamp d and and made fast therein by the customary screw, which,while it holds the tube in place, also binds the lead firmly in theholder.

What I claim as my invention is The lead-holder for drawing-dividers,herein described, consisting of a split metallic tube having ataperingpoint terminating in a shoulder, 0, said lead-holderconstituting a new article of manufacture, substantially as set forthand illustrated.

In testimony that I claim the foregoing I have hereunto set my hand this30th day of November, 1874.

SAMUEL L. FOX.

Witnesses J NO. A. BELL, M. DANL. OoNNoLLY.

